Phase transitions in hydrogen storage compounds under pressure

• Solid, hydrogen-rich compounds, such as alkali metal hydrides, MAH4, where M is an alkali metal and A is boron or aluminium, may be used for hydrogen storage. We briefly review recent high-pressure work in this field aimed at exploring the phase behaviour, and especially the possibility to find highly dense new structures. In particular we present experimental data on the structure, lattice dynamics, phase diagrams, and thermal properties obtained by us and others by Raman scattering, x-ray diffraction, and thermal conductivity measurements under pressure between 100 and 400 K. From these data and the results of theoretical calculations we map observed structural phases and phase transitions in the pressure–temperature plane for the materials that have so far been investigated under pressure.

Ämnesord

NATURVETENSKAP  -- Fysik -- Den kondenserade materiens fysik (hsv//swe)

NATURAL SCIENCES  -- Physical Sciences -- Condensed Matter Physics (hsv//eng)

Nyckelord

Hydrogen storage

hydrides

high pressure

phase transition

Raman scattering

thermal conductivity

LiBH4

NaAlH4

Condensed matter physics

Kondenserade materiens fysik

fysik

Physics

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